This research investigates the effectiveness of gamification strategies in enhancing student engagement and motivation in science education. The study introduces gamified learning activities, such as point systems, leaderboards, and digital badges, into the science curriculum. Through a series of surveys and classroom observations, the research finds that gamification significantly increases student participation, interest, and overall achievement in science subjects. The paper discusses the benefits of incorporating game-based elements into science teaching and provides recommendations for educators looking to implement gamification in their classrooms.

This type of research is an experimental research involving two experimental groups. The sample in this study was class XII.  1 as experimental class 1 and class XII. 2 as experimental class 2. Data were collected using questionnaires, tests, and observation sheets. The data were then analyzed descriptively and two-way analysis of variance (ANOVA) and continued with a post hoc test. The results of the study showed that (1) the average mathematics learning achievement of students using the Talk Stick cooperative learning model was 88.7 out of an ideal value of 100 with a very high category, (2) the average mathematics learning achievement of students using the Example Non-Example cooperative learning model was 87.6 out of an ideal value of 100 with a very high category, (3) there was a significant difference in mathematics learning achievement between students with high, medium, and low learning motivation with a significance of 0.001, and (4) there was no interaction between the cooperative learning model and motivation on mathematics learning achievement with a significance of 0.306.

Bioscrubber merupakan separator yang dapat digunakan untuk menurunkan konsentrasi hidrogen sulfida (H2S) pada biogas. Permasalahan yang mempengaruhi kinerja bioscrubber diantaranya yaitu jumlah oksigen berlebih (excess oxygen) dan suhu yang tidak sesuai dengan kebutuhan operasi sehingga menyebabkan tidak maksimalnya kinerja bioscrubber dalam menurunkan konsentrasi hidrogen sulfida (H2S). Untuk meminimalisir permasalahan ini maka dilakukan analisa data terkait kebutuhan jumlah oksigen berlebih dan suhu operasi yang optimal. Pada penelitian ini dilakukan pengumpulan data secara langsung yaitu dengan pengambilan data produksi biogas di Pembangkit Listrik Tenaga Biogas (PLTBg) Sei Mangkei yang kemudian dilakukan pengolahan data terkait kebutuhan excess oxygen dan suhu operasi pada proses separasi H2S. Dari penelitian yang dilakukan, diketahui bahwa proses penurunan konsentrasi H2S menggunakan bioscrubber yang ada di PLTBg Sei Mangkei membutuhkan excess oxygen sebanyak 363,4% dari kebutuhan oksigen teoritis dan suhu operasi 38oC untuk dapat menurunkan konsentrasi H2S hingga 97,5%.

This study investigates the use of formative assessments in improving student learning outcomes in mathematics. The research focuses on how regular, low-stakes assessments help teachers identify student misconceptions, provide timely feedback, and tailor instruction to meet students' needs. The study finds that formative assessments lead to higher student performance, particularly in understanding complex mathematical concepts. The paper explores various formative assessment techniques, such as quizzes, peer reviews, and self-assessments, and their effectiveness in fostering student learning and achievement in mathematics.

This research investigates the role of digital tools in the teaching of science, comparing traditional instructional methods with those enhanced by technology. A series of classroom interventions were implemented in secondary schools, utilizing digital simulations and interactive platforms. The results indicate that technology-enhanced methods improved student engagement, understanding of complex scientific concepts, and academic performance. The paper highlights the potential of digital tools to transform science education and recommends strategies for their effective integration in the classroom.

This study examines the role of digital simulations in improving university students' understanding of complex physics concepts. Utilizing an experimental design, the research assessed students' conceptual grasp before and after the use of digital simulations in instructional sessions. Results indicated a significant improvement in students' understanding and retention of physics concepts, particularly in areas such as electromagnetism and quantum mechanics. The findings support digital simulation as an effective tool for enhancing conceptual learning in science education.

This study explores the integration of mathematical and English language skills in the education of Generation Alpha, particularly in the context of Society 5.0. Using a Systematic Literature Review (SLR), the research analyzes existing literature to examine the role of these skills in shaping the future educational landscape. The findings suggest that both mathematical and English language skills are crucial for preparing students for the challenges of a technology-driven society. However, challenges such as gaps in educational resources and the digital divide persist. Opportunities arise from leveraging technology to enhance both subjects simultaneously, and project-based learning methods have shown promise. Furthermore, these skills are increasingly vital in the context of Society 5.0, where digital transformation, artificial intelligence, and technological advancement are central. This paper concludes by emphasizing the importance of integrating mathematical and English language skills to ensure that Generation Alpha is adequately prepared for future societal needs.

This study explores the effectiveness of inquirybased learning (IBL) in enhancing problemsolving skills among high school students in mathematics. The research is based on a case study conducted in a school where IBL methods were incorporated into the curriculum. The findings suggest that students engaged in inquirybased activities showed improved critical thinking and problemsolving abilities compared to traditional teaching methods. This paper discusses the impact of IBL on students' motivation and their ability to approach complex mathematical problems with greater confidence.

Chemical Oxygen Demand or Need Oxygen chemistry is amount oxygen is needed for waste organic matter in the water can? oxidized in a way chemistry . Chemical Oxygen Demand (COD ) have the value which is size For level pollution by material organic . COD value contained in material standard such as palm oil mill effluent can converted into biogas due to its high value so that allow For produce high biogas production . On study This done data collection in direct that is with using secondary data and primary data. From the research that has been done , known that  The more high COD Removal then the more The quality of the methane gas produced is also high . This is can seen based on at COD removal of 81%, it was obtained methane gas quality by 67%. And, increasingly high COD lowered so the more The biogas production produced is also high . This is can seen based on on COD reduction of 797,716 kg resulted in biogas production of 478,629 m3.

This study aims to (1) describe the characteristics of e-LKPD based on realistic mathematics education on system of linear equations with three variables oriented towards critical thinking skills and self-efficacy of vocational school students, (2) describe the feasibility of e-LKPD based on realistic mathematics education on system of linear equations with three variables oriented towards critical thinking skills and self-efficacy of vocational school students in terms of validity,  practicality and effectiveness. This type of research is research and development (Research and Development) with the ADDIE model (Analysis, Design, Development, Implementation, Evaluation). The research subjects were 34 students of class X TKP SMKN 2 Tarakan. In this research, One Group Pretest - Posttest Design was used. The research instruments used were validation sheets, practicality assessment sheets by teachers and students, learning implementation observation sheets, critical thinking ability tests and self-efficacy questionnaires. The results of the research show: (1) the e-LKPD developed contains characteristics found in the RME approach to the material of on system of linear equations with three variables oriented towards critical thinking skills and self-efficacy. The characteristics contained in RME-based e-LKPD include integrated learning, use of context, mathematization and construction processes and interactivity. (2) the RME-based e-LKPD developed meets the criteria for feasibility in terms of validity aspects with a percentage of feasibility according to material experts of 93.4% and media experts of 98.9% with the validation result criteria being very feasible; practicality with a very practical category based on the results of student and teacher responses; effectiveness based on critical thinking skills with classical completeness of students reaching 82.4%, the results of the T-test paired samples-test with a significance level of 5% obtained that there was an influence on students' critical thinking skills after treatment using RME-based e-LKPD, the N-Gain result was 0.73 with a high category, and the effectiveness of e-LKPD on self-efficacy with an increase in each self-efficacy indicator,  the N-Gain result was 0.3 in the moderate category, and the results of the Wilcoxon test on self-efficacy data with a significance level of 5%, it was obtained that there was an influence on students' self-efficacy after treatment using RME-based e-LKPD.